By the amount of gold per pound, the side-braze packages are the most valuable. For these, the fewer the number of leads (legs) they have, the more valuable they are per pound. Some are hard to count but I see 16 leads, 24 leads, and 40 leads. There is one 64 lead. Not counting the Eproms (with the window), the 16 leads are worth about $360/#, the 24 leads about $270/#, and the 40 leads about $180/#. The high value on these is mainly due to the gold braze that holds the lid and the chip.
The Eproms are worth a little less per pound because the lid/window weighs more than a regular lid.
I'm thinking the 486 packages run about $60/#. May be a little higher.